Miter-box.



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Patented .Tune 23, 190e.

PATENT OFFICE.

JOHN LARSON, OF CHICAGO, ILLINOIS.

wurm-Box.

r:EIEGIIFICAEIION forming part of Letters Patent No. 731,794, dated June 23, 1903. applicano; filed my 25,1902. serial No. 117.045. (No model `To a/ZZ whom t may concern:

Beit knownthat I, JOHN LARSON, a citizenl of the United States of America, and a resident of Chicago, Illinois, have invented a cer.-

4 5 tain new and useful Improvement in Miter- Boxes, of which the following is a specifica tion.

My invention relates to miter-boxes adapted for use by carpenters in sawing up lumber.

l Generally stated, it is the object of my invention to provide a simple,`inexpensive, andA highlyefficient miter-box.

` A special object is to provide a novel and effective arrangement of antifrictionerolls for reducing and practically eliminating all friction between the saw and the box'.

Another object is to provide a form of sawguide which can be employed in connection with the bases or bottom boards of different widths.

A further object is to provide a novel and effective arrangement for stopping the saw as soon as the latter has passed through the timp ber or piece of lumber held withinthe box. z Another object is to provide a form of sawguide which can be adjusted to fit saws of different thicknesses.

It is also an object to provide` certain details and features of improvement tending to improve the general efficiency and serviceability of a device of this character.

To the foregoing and other useful ends my invention consists in matters hereinafter set forth and claimed. 1

`In the accompanying drawings, Figure l is a side' elevation of a miter-box constructed in accordance with my invention. Fig. 2 is a plan of the miter-box shown in Fig. l. Fig. 3 x isa longitudinal section on line 3 3 in Fig. 2. 4o` Figs. i and 5 illustrate different ways of adjustably mounting the antifriction-rolls. Fig.

6 is a cross-section of the miter-box andfof a couple of bases which are interchangeable with each other and with the one shown in the miter-box.

Theconstruction thus illustrated is simple and inexpensive and has several advantages. For example, by providing each side of the `baseer bottom board A with a pair of guides Band O the said base or bottom board can be of any desired width. Thus it can be seen that the members of each pair of guides can be jcuts or grooves l and 2.

spaces in the guides.

arranged close together or far apart, according to the width of the base or bottom board. Vith a base or bottom board twice as wide as the one shown in Fig. 2 the cutsor grooves l and 2 would of course be much longer, but of the same angle. In such case the same guides shown in Figs. l and 2 can still be em ploye'd, it being only necessary to arrange them a little farther apart, so as to bring the guide-spaces opposite or in line with 4the said Again, and as a special `and important feature or advantage of my invention, the said guides `can be provided with antifriction-rolls D. In order to reduce friction and secure less resistance `to p and without danger of cramping or binding in the guide-spaces. Another important feature of my invention consists in making the said rolls adjustable toward and away from each other, so as to vary7 the size of the guide- This can be accoma plished in various ways-as, for example, by providing slotted connections X between the `rolls and the upright castings forlning the guides or guide-blocks. Again, each guide or guide-block can be divided into three sections, as shown in Fig. 4, each section `being slotted, as at Y, so as to permit the various sections of each guide-block to be adjusted toward and away from each other. In either case, however, it will be seen that the slots or guide grooves ofthe different guides or guide-blocks can be readily varied to accommodate saws of different thicknesses.

As another advantage of my improved construction the freely-rotating-balls E are arranged so as to stop the downward movement of the saw as soon `as the latter passes entirely through the timber or piece of lumber in the box. These balls are, it will be seen, preferably supported by cross-pieces c and held against lateral displacement by the rings e', which are sufficiently squared to have their corners engage the sides of the chambers or recesses c2. Thus it will be seen that as soon as the saw-teeth enter one of the rtov grooves 1,2, 3, or 4 the saw will be stopped and prevented from cutting into the base or bottom board A by reason of the rotary action of one of the balls. It will be observed that there is suflicient space around each ball to permit the sawdust to fall through and escape readily from the recesses or cavities in which the balls are held. Each guide or guideblock is preferably braced and connected with the base or bottom board by means of an inclined bar Z. The lower ends of these bars Z are, as will be observed, of such character as to serve as feet for the miter-box.

Thus it will be seen that I not only provide a construction which tends to eliminate all friction between the saw and the guides, but also that I provide a form of guide or guideblock which is applicable to any width of base or bottom board. In other words, the side or guide pieces of my improved miter-box are made in sections, which can be separated more or'less according` to the width of the base.

With my improved construction it will be seen that the base of the miter-box is thickened sufficiently to permit of its being formed with recesses adapted to receive the freelyrotatable wooden balls. As explained, the guide-openings across the top of the base intersect these recesses, and in this way the balls are enabled to stop the saw before it cuts into the base. Furthermore, each side of the miter-box is, as stated, preferably composed of a plurality of blocks having guideopenings adapted to register with the guideopenings extending across the top of the base. These blocks, which are preferably in the natureof castings carrying the antifriction-rolls, are preferably secured to the sides of the base by screws, as illustrated. This division of each side of the miter-box into a plurality of independent blocks has a peculiar advantage. Vith this arrangement itwill be observed that the sides are applicable to bases of different widths, the blocks being adapted for more or lessA separation longitudinally of the base, according to the width of the latter. Thus, although the-cuts or guide-openings in both the blocks and the bases are of a fixed angularity` these sides can be secured to a base of any width. Byadapted for more or less separationlongitudinally of the base.I mean that the blocks constituting each side can be arranged either near together or some distance apart, according to the width of the base. If the base is comparatively narrow, then the lblocks at each side will be brought nearer together, andl if, on the other hand, the base is of considerable width then the blocks at each side will be located at some distance apart. In either case, however, it will be seen that the blocks are secured fiatwise to the sides of the base, and are consequently always parallelthat is to say, the blocks at one side are always parallel with the blocks at the other side,regar`dless of the width of the base. With a plurality of rolls mounted for independent -side are located. numberof bases whichare of dierent widths rotation and arranged one above the other at each side of the guide-openings the saw can work across the miter-box with considerable less friction and with greater facility than would be the case should only one long roll be arranged at each side of the guide-openings. There are also other advantages which will be readily apparent to mechanics and carpenters and those skilled in the art.

lVith my improved sides and with a plurality o f interchangeable bases the width of the miter-box can be readily varied, so as to ysuit the requirements with respect to dierent widths of lumber. In other words, the combination of miter-box sides each composed of a plurality of sections with a plurality of interchangeable bases enables me to provide a miter-box of a variable width, and it will be observed that this variation in width is obtained by simply substituting one base for another and without at all adjusting or changing the sides, except that the wider the base the farther apart the sections of each In Fig. 6 I have shown a and which are interchangeable with the base shown in Fig. It will be readily understood that the cuts or guide-grooves in the top of the base can be made with a saw after the sectional sides have been applied. In

After the sides have once the desired character, and consequently after this the bases can be interchanged without the necessity of making the cuts or grooves.

What I claim as my invention is l. A miter-.box comprising a thickened base having recesses form ed on its under side, and guide-openings on its upper side, sides secured to said base, said sides being provided with guide openings registering with the guide-openings extending across the top of the base, said latter guide-openings intersecting saiddrc'esses, and freely-rotatable wooden balls held in said-recesses said balls being adapted to prevent the sawrfrom cutting into the base.

2. A Initer-box comprising a base having recesses formed on its under side andguideopenings on its upper side, sides secured to said base, each side being provided with guide-openings registering with the openings extending across the top of said base, the guide-openings in the base intersecting said recesses, and freely-rotatable wooden balls held in said recesses, the latter being polygonal in shape, so as to provide corners or openings through which the sawdust may pass.

A miter-box comprisinga thickened wooden base having its top provided with yguide-openings, a plurality of metal castings secured to each side of said base and provided IOO TIO

\ orless separation longitudinally of the latter,

according to the width of the base, and each casting being provided with a number of anti- `friction-rolls, said rolls being mounted for independent rotation and arranged one above Vthe other at each side of the guide-openings,

together with one or more bases Which are of different widths and interchangeable with said iirst-mentionedbase. 4

4. A miter-box comprising a suitable base having its top provided with guide-openings, sides secured to said base and provided with guide -openings registering with the said guide-openings in the base, all of said guideopenings being of fixed angularity, and each y of said sides being composed of a plurality of independent blocks, the said blocks being y adapted for more or `less separation longitudinally of the base, according to the particular i Width of the latter, together with one or more bases which are of diere'nt widths and interchangeable With said first-mentioned base.

5. A :miter-box comprising a suitable base, saidbase being provided with a plurality of guide-openings, sides secured to said base, each of said sides being composed of a plurality of independent blocks, each block being provided with guide-openings adapted to register with the guide-openings in the base, cach block being also provided with screwopenings, and screws extending through said openings to fasten said blocks to the sides of said base, thesaid blocks being adapted for more or less separationlongitudinally of said base, accordingto thewidth of the latter, toget-her with oneor more bases which are of diiferent Widths and interchangeable with said first-mentioned base.

6. A miter-boX comprising a suitable base having its top provided with guide-openings,

`sides secured to said base and provided with guide-openings registering with the guideopenings in the base, yeach of said sides being composed of a `plurality of independent blocks, a plurality of rolls mounted on each block and arranged one above the other at each side of said guide-openings, the blocks thus provided with antifriction-rolls being adapted for more or less separation longitu- `dihally of the said base, according to the width of the latter, together with one or more bases which are of different widths and interchangeable with said first-mentioned base.

7. A miter-boxcomprising a suitable base and a plurality of guide-blocks secured to each side of said base, each guide-block having one `or more guide-openings, and the dif-V ferent guide-blocks being adapted `for-more or less separation longitudinally of the said base, according to the width of the latter, to-

gether with one or more bases which are of` diii'erent widths 'and interchangeable with said first-mentioned base.

mounted on said sides, said rolls being ar ranged one above the other at each side of the guide-openings in said sides.

lO. A miter-boX comprising a suitable base, sides secured to the said base, the base having recesses, balls in said recesses, and antifriction-rolls mounted on said sides at each side of the guide-openings therein, sections ofl said sides being adjustable toward and away from each other for the purpose of varying the size of the guide-openings, and plates secured to and flush with the bottom of said base, each plate being adapted to support one of said balls and partially close the bottom of one of said recesses.

ll. A miter-box comprising a suitable base Vprovided with a recess, sides secured to said base, and a freely-rotatable ball arranged in said recess and adapted to stop the downward movement of the saw, said ball and recess being located substantially midway between said sides, a plate secured to and flush with the bottom of said base, said plate being adapted to support said ball and partially close the bottom of said recess.

l2. Amiter-box comprising a suitable base, and a plurality of separate and independent guide-blocks secured to each side of saidbase, each block having one or more guide-openings of fixed angularity, the blocks being adapted for more or less separation longitudinally of the base, according to the width of the latter, together with one or more bases whichare of different widths and interchangeable with said first-mentioned base.

13. InA a miter-boX, the combination of a pair of miter-boX sides, each side being .composed of a plurality of separate and independent sections, each section having one or more guide-openings of iiXed angularity, and a plurality of interchangeable bases of different widths. v

14. A miter-box comprising a suitable base, sides for said base, each side consisting of a plurality of independently-mounted and suitably-separated castings provided with guideopenings of xed angularity, and each casting being provided with a plurality of antifriction-rolls, said rolls being mounted iior independent rotation an d arranged one above the other at each side of thc guide-openings.

l5. A miter-box comprising a suitable base,

sides for said base, each side consisting of a IIO Igc

plurality of independently-mounted and suitably-separated guide-blocks, and each guidebloelc being provided with one 011 inoie guideopenings of fixed 0i' permanent angularity, the sides ths divided into independent seetions permitting, Within limits, :L Variation in the Width of said base.

Signed by me at Chicago, Illinois, this '14th day of July, 1902.

JOHN LARSON.

Witnesses:

ARTHUR F. DURAND, WM. A. HARDERS. 

